EP0095951B1 - Axe de piston et piston, notamment pour moteur à combustion interne, équipé dudit axe - Google Patents

Axe de piston et piston, notamment pour moteur à combustion interne, équipé dudit axe Download PDF

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Publication number
EP0095951B1
EP0095951B1 EP83400896A EP83400896A EP0095951B1 EP 0095951 B1 EP0095951 B1 EP 0095951B1 EP 83400896 A EP83400896 A EP 83400896A EP 83400896 A EP83400896 A EP 83400896A EP 0095951 B1 EP0095951 B1 EP 0095951B1
Authority
EP
European Patent Office
Prior art keywords
channels
piston
annular groove
piston shaft
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83400896A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0095951A1 (fr
Inventor
Jean-Paul Coulin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MAN Energy Solutions France SAS
Original Assignee
Societe dEtudes de Machines Thermiques SEMT SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Societe dEtudes de Machines Thermiques SEMT SA filed Critical Societe dEtudes de Machines Thermiques SEMT SA
Publication of EP0095951A1 publication Critical patent/EP0095951A1/fr
Application granted granted Critical
Publication of EP0095951B1 publication Critical patent/EP0095951B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/16—Pistons  having cooling means
    • F02F3/20—Pistons  having cooling means the means being a fluid flowing through or along piston
    • F02F3/22—Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/10—Connection to driving members
    • F16J1/14—Connection to driving members with connecting-rods, i.e. pivotal connections
    • F16J1/16—Connection to driving members with connecting-rods, i.e. pivotal connections with gudgeon-pin; Gudgeon-pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/06—Arrangements for cooling pistons
    • F01P3/10—Cooling by flow of coolant through pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
    • F01M2001/086—Lubricating systems characterised by the provision therein of lubricant jetting means for lubricating gudgeon pins

Definitions

  • the present invention relates to a piston pin, for a piston, in particular of an internal combustion engine, of the type articulated by a piston pin, substantially cylindrical, to a connecting rod foot, said piston pin being mounted rotating in a bearing of said foot.
  • connecting rod provided with an annular groove, in particular situated in the longitudinal median plane of symmetry of said piston pin and said connecting rod foot, and communicating with the end of a coolant and / or lubrication fluid supply channel extending in the body of the connecting rod and opening at the end surface of the connecting rod, and in two spaced bearings integral with the piston, located on either side of the connecting rod and whose bearings are provided with grooves annulars.
  • the piston pin in particular from document FR-A-2435640, is pierced with a number of channels, in particular rectilinear, each opening at one end in the annular groove of the bearing of the big end and, at the other end, in one or the other of the annular grooves of the axis bearings, this said axis being moreover full.
  • the present invention therefore aims to overcome this drawback by proposing a piston pin, for a piston, in particular for an internal combustion engine, of the type indicated above and characterized in that said channels are formed in a peripheral part of said axis. piston by being at most tangent to a substantially cylindrical central part of said axis, coaxial with the latter, in which the concentration of metallic impurities is maximum.
  • the diameter of the above-mentioned cylindrical central part is at least equal to approximately one tenth of the diameter of the aforementioned piston pin; the aforementioned channels being non-intersecting.
  • At least two of the aforementioned channels converge towards their ends opening into the aforementioned annular groove of the connecting rod bearing.
  • two channels converge towards their aforementioned ends opening into the annular groove of the big end bearing, their other ends opening respectively into the annular grooves of the axis bearings.
  • each point of convergence of the longitudinal axes of the aforementioned channels and two ends of the longitudinal axes of said channels opening respectively into the annular grooves of the axis bearings can be aligned along a generatrix of the axis piston.
  • the aforementioned piston pin is pierced with three pairs of aforementioned channels, each pair comprising a channel connecting the aforementioned annular groove of one of the axis bearings to the annular groove of the the big end bearing, and a channel connecting the annular groove of the other axle bearing, to the annular groove of the big end bearing; the ends of the longitudinal axes of said channels opening into said annular groove in the big end bearing being angularly spaced by 60 °.
  • the ends of the longitudinal axes of the aforementioned channels opening into the grooves of the axis bearings are preferably angularly spaced by 120 °.
  • the orifices of the aforementioned channels opening onto the aforementioned annular groove of the big end bearing belong to the channels connecting said annular groove of the big end bearing to alternately one and the other annular grooves of the axis bearings .
  • the piston 1, in particular of an internal combustion engine, equipped with the piston pin 2 according to the invention, is of the type articulated by said piston pin 2 to a connecting rod foot 3, said piston pin 2 being mounted rotating in a bearing 4 of the connecting rod end 3 provided with an annular groove 5, in particular situated in the longitudinal median plane of symmetry of the piston pin 2 and in the longitudinal median plane of foot symmetry connecting rod 3.
  • the annular groove 5 communicates with the end of a channel 6 for supplying cooling fluid and / or lubrication, in particular oil, extending in the body of the connecting rod 7 and opening out at the end surface of the big end 3.
  • the piston pin 2 is also mounted rotating in two spaced-apart bearings 8 integral with the piston, situated on either side of the big end 3 and provided with annular grooves 10.
  • the piston pin 2 is pierced with a number of channels 11a to 11f, in particular rectilinear, each opening at one end 13a to 13f in the annular groove 5 of the connecting rod bearing 4 and at the other end 14a to 14f in one or the other of the annular grooves 10 of the axis bearings 8, this axis also being full.
  • the channels 11a-11f are formed in a peripheral part 15 of said piston pin 2 being at most tangent to a substantially cylindrical central part 16 of said axis coaxial with it, in which the concentration of metallic impurities is maximum.
  • This arrangement makes it possible to avoid the risks of crack initiation and rupture in the area surrounding the longitudinal geometric axis of the piston axis where the embrittling metallic impurities generally accumulate, and to avoid concentrations of stresses resulting from intersecting holes.
  • the diameter of the cylindrical central part 16 is in particular at least equal to approximately one tenth of the diameter of the piston pin 2, for example, as shown in FIG. 2, equal to approximately one tenth of the diameter of the piston pin; or as shown in FIG. 5, approximately equal to one third of said diameter.
  • the channels do not meet the longitudinal geometric axis XX 'of the axis of the piston, nor the immediately surrounding area.
  • the channels 11a-11f are arranged so as not to be mutually intersecting; in particular in the area surrounding the aforementioned longitudinal geometric axis X-X '.
  • Channels 11a-11f can be drilled so that at least two of said channels converge towards their ends opening into the annular groove 5 of the connecting rod bearing 4.
  • two channels converge towards said ends, while their others ends respectively open into one and the other of the annular grooves 10 of the axis bearings 8.
  • the piston pin 2 is crossed by three pairs of straight channels 11a, 11b: 11c, 11d; 11e, 11f which converge two by two towards their ends 13a, 13b; 13c, 13d: 13e, 13f opening into the annular groove 5 of the bearing 4 of the connecting rod end 3 by defining a common orifice, in said groove. to both channels.
  • the other ends 14a, 14b: 14c, 14d: 14e. 14f of said channels taken two by two open into one and the other of the annular grooves 10 of the axis bearings 8, respectively.
  • the end 14a of the channel 11a for example opens into an annular groove 10 of an axis bearing 8 while an end 14b of the channel 11b opens into the annular groove of the other axis bearing, the other ends 13a, 13b of the channels 11 a, 11 b opening out through a common orifice in the annular groove 5 of the bearing 4 of the connecting rod foot 3.
  • the points of convergence of the longitudinal axes of the channels 11a, 11b; 11c, 11d; 11e, 1 lf are angularly spaced by 120 °, as are the ends of the longitudinal axes of said channels opening into the annular grooves 10 of the axis bearings 8.
  • each point of convergence of the longitudinal axes of the channels 11a-11f and two ends of the longitudinal axes of said channels opening respectively into the annular grooves 10 of the axis bearings 8 are aligned along a generatrix of the piston pin 2.
  • the piston pin is pierced with three pairs 11a , 11b; 11c, 11d; 11th, 11f of channels.
  • the points of convergence of the longitudinal axes of the channels, as well as the ends of the longitudinal axes of the channels opening into the annular grooves of the axis bearings are angularly spaced 120 °.
  • the ends 13a, 13b of these converge in the same orifice opening into the annular groove 5 of the connecting rod bearing 4, an orifice which is aligned along a generator of the piston pin 2 with the ends 14e, 14d of the channels 11e, 11d, respectively, opening into one and the other of the annular grooves 10 of the axis bearings 8, respectively.
  • the piston pin 2 is pierced with three pairs 11a-11f channels, this number is of course not limiting.
  • Each pair comprises a channel 11a, 11c, 11e connecting the annular groove 10 of one of the axis bearings 8 to the annular groove 5 of the connecting rod bearing 4 3 and a channel 11b, 11d, 11f connecting the annular groove 10 of the other axis bearing 8 to the annular groove 5 of the connecting rod bearing bushing 3 3.
  • ends 13a-13f which time produced independently, of the longitudinal axes of the channels 11a-11f open into the annular groove 5 of the connecting rod bearing 4 by being angularly spaced, for example 60 °.
  • the ends 14a-14f of the longitudinal axes of the channels 11a-11f open into the annular grooves 10 of the axis bearings 8 by being angularly spaced, for example 120 °.
  • piston pin according to the invention is fixed in its housing by any suitable means such as, for example, locking rings or circlips 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
EP83400896A 1982-05-28 1983-05-03 Axe de piston et piston, notamment pour moteur à combustion interne, équipé dudit axe Expired EP0095951B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8209424A FR2527728A1 (fr) 1982-05-28 1982-05-28 Axe de piston et piston, notamment pour moteur a combustion interne, equipe dudit axe
FR8209424 1982-05-28

Publications (2)

Publication Number Publication Date
EP0095951A1 EP0095951A1 (fr) 1983-12-07
EP0095951B1 true EP0095951B1 (fr) 1986-03-05

Family

ID=9274473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83400896A Expired EP0095951B1 (fr) 1982-05-28 1983-05-03 Axe de piston et piston, notamment pour moteur à combustion interne, équipé dudit axe

Country Status (12)

Country Link
US (1) US4550647A (es)
EP (1) EP0095951B1 (es)
JP (1) JPS58217752A (es)
KR (1) KR840004800A (es)
BR (1) BR8302607A (es)
DE (1) DE3362393D1 (es)
DK (1) DK154104C (es)
ES (1) ES272433Y (es)
FI (1) FI70453C (es)
FR (1) FR2527728A1 (es)
NO (1) NO163248C (es)
SU (1) SU1207401A3 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10255731A1 (de) * 2002-11-29 2004-06-09 Mahle Gmbh Kolben für einen Verbrennungsmotor

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0743539Y2 (ja) * 1989-02-28 1995-10-09 いすゞ自動車株式会社 ピストンピン構造
US5861353A (en) * 1992-10-06 1999-01-19 Montecatini Tecnologie S.R.L. Catalyst in granular form for 1,2-dichloroethane synthesis
IT1256156B (it) * 1992-10-06 1995-11-29 Montecatini Tecnologie Srl Catalizzatore in granuli particolarmente per la deidrogenazione ossidativa di metanolo a formaldeide
US5542341A (en) * 1994-08-24 1996-08-06 Bristol Compressors, Inc. Wrist pin construction
US5850777A (en) * 1997-07-09 1998-12-22 Coltec Industries Inc. Floating wrist pin coupling for a piston assembly
RU2500909C1 (ru) * 2012-04-10 2013-12-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Елецкий государственный университет им. И.А. Бунина" Кривошипно-шатунный механизм двс
WO2013182732A1 (en) 2012-06-04 2013-12-12 Componenta Finland Oy Piston for internal combustion engine
US10208743B2 (en) 2016-10-07 2019-02-19 Westinghouse Air Brake Technologies Corporation Piston cylinder arrangement for an oil free compressor having cooling passageways and method of cooling wrist pin bearing surface

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1292312A (en) * 1917-03-06 1919-01-21 Oscar Robert Gronkwist Lubricator for engines.
US1888064A (en) * 1930-09-17 1932-11-15 Frank S Barks Lubricator
US2035450A (en) * 1934-11-19 1936-03-31 Gladeon M Barnes Piston
US2085814A (en) * 1934-12-17 1937-07-06 Int Motor Co Lubrication system
DE1002564B (de) * 1954-01-26 1957-02-14 Zuendapp Werke Ges Mit Beschra Zweitaktmotor mit einer Kolbenbolzenschmierung
US2823085A (en) * 1954-02-06 1958-02-11 Kloeckner Humboldt Deutz Ag Piston for internal combustion engines
DE1303444B (de) * 1964-02-27 1971-10-28 Bosch Gmbh Robert Schmiereinrichtung an einem Verdichterkolben
FR2125687A5 (es) * 1971-02-16 1972-09-29 Semt
SE422979B (sv) * 1978-09-06 1982-04-05 Bofors Ab Flytande kolvtapp till forbrenningsmotor med oljekyld kolv
FR2483521A1 (fr) * 1980-05-30 1981-12-04 Semt Piston de machine a pistons alternatifs, notamment de moteur a combustion interne

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10255731A1 (de) * 2002-11-29 2004-06-09 Mahle Gmbh Kolben für einen Verbrennungsmotor

Also Published As

Publication number Publication date
FI70453B (fi) 1986-03-27
ES272433Y (es) 1984-05-16
DK154104C (da) 1989-02-27
DK227983D0 (da) 1983-05-20
JPS58217752A (ja) 1983-12-17
NO831909L (no) 1983-11-29
DE3362393D1 (en) 1986-04-10
JPH0429863B2 (es) 1992-05-20
NO163248B (no) 1990-01-15
FR2527728A1 (fr) 1983-12-02
NO163248C (no) 1990-04-25
DK154104B (da) 1988-10-10
FI831922L (fi) 1983-11-29
FI831922A0 (fi) 1983-05-30
DK227983A (da) 1983-11-29
EP0095951A1 (fr) 1983-12-07
US4550647A (en) 1985-11-05
ES272433U (es) 1983-11-16
BR8302607A (pt) 1984-01-17
SU1207401A3 (ru) 1986-01-23
FR2527728B1 (es) 1985-04-19
KR840004800A (ko) 1984-10-24
FI70453C (fi) 1986-09-19

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